Thanks for the info. In my last reply, I used the word funny. I should have written that what you said about torque was right on the mark. I am glad you took it the right way. I too remember something that I read and probably did see it on RCO. It must have been in the last year. That is when I found RCO.
I too have stock mufflers. I take the time to "Cook" out the old gunk that sometimes clogs them up. I have an "Evra" with a straight pipe that is just a Ryobi with mounting lugs. I have not run it yet. I ran it's pipe on my Ryobi. Once again, day long headache from the unbelievable noise. Thanks again for the advice and info an what works for you. It helps!
SPADMONIAN